Sewing machine spool pins and mountings



Dec. 21, 1965 M- R. LAIDlG 3,224,708

SEWING MACHINE SPOOL PINS AND MOUNTINGS Filed Sept. 18, 1963 INVENTOK Manfred R. Laidig Y AT TORNE Y WITNESS United States Patent Filed Sept. 18, 1963, Ser. No. 309,834 3 Claims. (Cl. 242129.8)

This invention relates to sewing machines and more particularly to means for supporting a spool of thread on a sewing machine, and the primary object of the present invention is to provide an improved device of this character.

Another object of the invention is to provide an improved means for mounting a spool pin on a sewing machine.

A further object of the invention is to provide an improved resilient mounting for a spool pin which is so constructed and arranged that the spool pin can move slightly away from a vertical position and thus prevent the spool from walking up the pin.

A still further object of the invention is to provide a spool pin mounting which will not transmit noise from the spool pin to the sewing machine frame.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of the invention and the advantages attained thereby, will be readily understood by those skilled in the art.

in the drawings:

FIG. 1 is a front elevational view of a portion of a family-type sewing machine equipped with a spool pin embodying the present invention, portions being cut away to show constructional details,

FIG. 2 is a fragmentary view similar to a portion of FIG. 1 but showing the spool pin in two slightly different positions,

FIG. 3 is a sectional view taken on the line 3-3 of FIG. 1, and

FIG. 4 is an exploded perspective view showing various parts of the spool pin and its mounting.

Referring more specifically to the drawings, the invention is disclosed as embodied in a sewing machine 16 having a bracket arm 17, the top of which is closed by a cover or part 18 and at one side of which is rotatably mounted a conventional handwheel 19. Other parts of the sewing machine may be conventional and need not be shown or described.

The top wall 21 of the cover part 18, at a location adjacent to the handwheel 19, is formed with a raised boss 22 having opposed faces and defining an aperture comprising an upwardly open recess 23 and a downwardly open recess 24, the two recesses being connected by 21 preferably circular hole 26 formed by an internal annular rib 27. Both upper and lower edges of the rib 27 are beveled as shown at 28 and 29 respectively, and the internal annular rib 27 is especially designed to mount a spool pin 32 in a manner hereinafter set forth.

An upper portion 33 of the spool pin 32 is preferably cylindrical in form and larger in diameter than the preferably cylindrical lower spool pin portion 34. The spool pin 32 is also provided with a flange 37 which may be formed integral with the portions 33 and 34 or which may be manufactured as a separate piece and forced on the portion 34 until it abuts a shoulder 36 formed at the junction of the portions 33 and 34.

The spool pin 32 is resiliently supported on the cover 18 by reason of an upper resilient ring shaped damper 38 located below the flange 37 and above the rib 27 and by reason of a lower resilient ring shaped damper 39 located below the rib 27. A plastic backup washer 41 is located below the lower damper 39 and the washer 41 is held in place on the lower portion 34 of the spool pin 32 by a dished and toothed retaining ring 42. It will be understood that, when the various parts are assembled, the retaining ring 42 is pushed against the washer 41 with sutficient force to cause the body material of the dampers 38 and 39 to flow into the hole 26 and against the bevels 28 and 29. This arrangement assures that the spool pin will be firmly held in a vertical position. Nevertheless, the two dampers 38 and 39 provide sufficient resilience so that the spool pin can be moved slightly out of the vertical position, for example, to inclined positions shown by dash-dash lines and by solid lines in FIG. 2.

When the spool pin 32 is installed on a sewing machine, the recess 23 and the flange 37 are covered by an appearance disc 44 which may be made of a resilient material such as felt.

The spool pin and mounting of the present invention are advantageous because:

(a) The upper and lower dampers 38 and 39 insulate the spool pin 32 from the cover 18 and reduce any noise generated because of a spool rotating on or otherwise bumping against the spool pin 32.

(b) The upper and lower dampers 3S and 39 permit the spool pin to move slightly out of the vertical position and thereby prevents a spool from walking up the spool pin to a position Where it may leave the top of the pin.

Having thus set forth the nature of the invention, What I claim herein is:

1. In combination, a sewing machine part having 0pposed faces and defining an aperture, a first resilient ring shaped damper located on one face of said part adjacent to said aperture, a second resilient ring shaped damper located on said opposed face and adjacent to said aperture, a spool pin extending through the aperture in said sewing machine part and through said dampers, a flange carried on said spool pin and located above said first damper, a backup washer carried on said spool pin below said second damper, and a retaining ring held to said spool pin at a location below said backup washer.

2. In combination, a sewing machine part having opposed faces shaped to provide an open recess in one of said faces and an open recess in the opposed face, the innermost portions of said two recesses being connected by a hole, a first resilient damper located in the open recess in one of said faces, a second resilient damper located in the open recess in said opposed face, a spool pin extending through the hole in said sewing machine part and through said dampers, and means retaining said dampers on said spool pin.

3. In combination, a sewing machine part having opposed faces and formed with a rib defining an aperture shaped to have an open recess on one of said faces and an open recess on the opposed faces, the two recesses being connected by a hole, a first resilient ring shaped damper located in the open recess in one of said faces, a second resilient ring shaped damper located in the open recess in said opposed face, a spool pin extending through the aperture in said sewing machine part and through said dampers, a flange formed on said spool pin and located on one side of said first damper, a backup washer carried on said spool pin on one side of said second damper, and a retaining ring held to said spool pin at a location adjacent to said backup Washer, said retaining ring forcing said dampers to enter said hole.

References Cited by the Examiner UNITED STATES PATENTS 910,210 4/1909 Poulsen 242140 2,232,667 2/1941 Saurer 242358 MERVIN STEIN, Primary Examiner. 

1. IN COMBINATION, A SEWING MACHINE PART HAVING OPPOSED FACES AND DEFINING AN APERTURE, A FIRST RESILIENT RING SHAPED DAMPER LOCATED ON ONE FACE OF SAID PART ADJACENT TO SAID APERTURE, A SECOND RESILIENT RING SHAPED DAMPER LOCATED ON SAID OPPOSED FACE AND ADJACENT TO SAID APERTURE, A SPOOL PIN EXTENDING THROUGH THE APERTURE IN SAID SEWING MACHINE PART AND THROUGH SAID DAMPERS, A FLANGE CARRIED ON SAID SPOOL PIN AND LOCATED ABOVE SAID FIRST DAMPER, A BACKUP WASHER CARRIED ON SAID SPOOL PIN BELOW SAID SECOND DAMPER, AND A RETAINING RING HELD TO SAID SPOOL PIN AT A LOCATION BELOW SAID BACKUP WASHER. 